CN220505789U - Seal assembly and electric toothbrush - Google Patents

Abstract

The embodiment of the application discloses a sealing component which is sleeved on a motor shaft of an electric toothbrush and seals a space between the motor shaft and a handle shell of the electric toothbrush, wherein the sealing component comprises a hard sealing frame and a flexible sealing sleeve for coating the hard sealing frame; the hard sealing frame comprises an axial sealing part and a radial sealing part which is annularly arranged on the periphery of the axial sealing part; the flexible seal cartridge includes an axial seal face extending in an axial direction of the motor shaft and a radial seal face extending in a radial direction of the motor shaft. According to the utility model, the hard sealing frame is coated by the flexible sealing sleeve, so that the anti-falling capability of the sealing assembly is enhanced, and the problem that the supporting effect of the hard sealing frame is invalid due to external force impact, so that the sealing effect of the flexible sealing sleeve is poor is avoided. Due to the support of the hard sealing frame, the axial sealing surface realizes axial sealing between the motor shaft and the sealing assembly and between the handle shell and the sealing assembly, and the radial sealing surface realizes radial sealing between the handle shell and the sealing assembly.

Description

Seal assembly and electric toothbrush

Technical Field

The present application relates to the field of electric toothbrushes, and more particularly to a seal assembly and an electric toothbrush.

Background

When the electric toothbrush is used, water easily enters the shell from the joint of the motor shaft and the shell, so that electric components such as the motor, a battery, a circuit board and the like in the shell are damaged. A flexible seal is typically provided at the junction of the motor shaft and the housing to effect the seal. However, the supporting force of the flexible seal is limited, resulting in poor sealing effect of the flexible seal. It is currently common to use a fastener over the outside of the flexible seal to enhance the sealing effect between the flexible seal and the motor shaft or to add a support under the flexible seal to enhance the sealing effect between the flexible seal and the housing.

Although the sealing effect of the flexible sealing element can be enhanced to a certain extent by the technology, as the hard fastening piece or the hard supporting element is arranged on the outer side of the flexible sealing element, when the electric toothbrush falls down, the fastening piece or the supporting element is easy to loosen or damage, so that the sealing effect of the flexible sealing frame is poor.

The foregoing is merely provided to facilitate an understanding of the principles of the utility model and is not admitted to be prior art.

Disclosure of Invention

In view of the above problems, the present utility model provides a sealing assembly, which aims to solve the technical problem that a fastener or a supporting member is easy to loosen or damage due to falling of an electric toothbrush, so that the sealing effect of a flexible sealing frame is poor.

In order to achieve the above object, the seal assembly provided by the utility model comprises a hard seal frame and a flexible seal sleeve wrapping the hard seal frame; the flexible sealing sleeve is used for being sleeved on the periphery of the motor shaft; the hard sealing frame comprises an axial sealing part and a radial sealing part which is annularly arranged on the periphery of the axial sealing part; the flexible sealing sleeve comprises an axial sealing surface extending along the axial direction of the motor shaft; the axial sealing part is used for supporting the axial sealing surface in the radial direction of the motor shaft so as to enable the axial sealing surface to be in sealing fit with the motor shaft and/or the handle shell; the flexible sealing sleeve comprises a radial sealing surface extending along the radial direction of the motor shaft; the radial sealing part is used for supporting the radial sealing surface in the axial direction of the motor shaft so as to enable the radial sealing surface to be in sealing fit with the handle shell.

Further, the flexible sealing sleeve comprises a sealing sleeve; the outer side surface and the inner side surface of the sealing sleeve form the axial sealing surface; an axial sealing groove is formed in the side wall of the sealing sleeve, and extends along the axial direction of the sealing sleeve; the axial sealing part is adaptively embedded in the axial sealing groove, and supports the outer side face and the inner side face of the sealing sleeve, so that the outer side face and the inner side face of the sealing sleeve are respectively in sealing fit with the handle shell and the motor shaft.

Further, the flexible sealing sleeve further comprises a sealing ring which is arranged on the periphery of the sealing sleeve in a surrounding mode, and the upper end face of the sealing ring forms the radial sealing surface; the sealing ring is provided with a radial sealing groove communicated with the axial sealing groove, and the radial sealing groove extends along the radial direction of the sealing ring; the radial sealing part is adaptively embedded in the radial sealing groove, and supports the upper end face of the sealing ring along the axial direction of the sealing ring, so that the upper end face of the sealing ring is in sealing fit with the handle shell.

Further, the axial sealing part extends along the axial direction of the sealing sleeve to form a cylindrical ring; the radial sealing part extends along the radial direction of the sealing ring to form a flat backing ring; the flat cushion ring surrounds and is connected with the periphery of the lower end of the cylindrical ring; the outer side surface and the inner side surface of the cylindrical ring respectively support the outer side surface and the inner side surface of the sealing sleeve along the radial direction of the cylindrical ring; the upper end face of the flat gasket ring supports the upper end face of the sealing ring along the axial direction of the flat gasket ring.

Further, the inner side surface of the sealing sleeve is partially bulged to form at least one first sealing ring extending around the circumference of the sealing sleeve, and the inner side surface of the cylindrical ring supports the first sealing ring along the radial direction of the cylindrical ring; the outer side wall portion of the sealing sleeve bulges to form at least one second sealing ring extending around the circumference of the sealing sleeve, and the outer side surface of the cylindrical ring supports the second sealing ring along the radial direction of the cylindrical ring.

Further, the first sealing ring and the second sealing ring are both arranged corresponding to the cylindrical ring.

Further, the upper end surface of the sealing ring is partially bulged to form at least one third sealing ring extending around the circumference of the sealing sleeve; the third sealing ring is arranged corresponding to the flat gasket ring, and the upper end face of the flat gasket ring supports the third sealing ring along the axial direction of the flat gasket ring.

In one embodiment, the flexible boot seal is injection molded around the periphery of the rigid seal housing.

Further, at least one fixing hole is formed in the cylindrical ring and/or the flat backing ring; and the flexible sealing sleeve is injection-molded and filled in the fixing hole.

Further, the fixing hole is formed in the side wall of the cylindrical ring and is close to the upper end face of the cylindrical ring.

The utility model also provides an electric toothbrush which comprises a handle shell, a motor shaft and a sealing component, wherein the specific structure of the sealing component refers to the embodiment, and as the electric toothbrush adopts all the technical schemes of all the embodiments, the electric toothbrush at least has all the beneficial effects brought by the technical schemes of the embodiments, and the details are not repeated. Wherein, the top end of the handle shell is provided with a through hole, and the motor shaft penetrates through the through hole; the sealing component is sleeved on the motor shaft and is clamped between the motor shaft and the inner wall surface of the through hole.

Further, the electric toothbrush further comprises a motor body located within the handle housing; the sealing component is clamped between the upper end face of the motor main body and the handle shell.

According to the utility model, the hard sealing frame is coated by the flexible sealing sleeve, so that the anti-falling capability of the sealing assembly is enhanced, and the problem that the supporting effect of the hard sealing frame is invalid due to external force impact, so that the sealing effect of the flexible sealing sleeve is poor is avoided. The axial sealing surfaces of the flexible boot seal achieve an axial seal between the motor shaft and the seal assembly and between the handle housing and the seal assembly, and the radial sealing surfaces of the flexible boot seal achieve a radial seal between the handle housing 30 and the seal assembly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 shows a schematic structural view of an embodiment of a seal assembly of the present utility model;

FIG. 2 is an exploded view of the seal assembly of FIG. 1 from another perspective;

FIG. 3 is a top view of the seal assembly of FIG. 1;

FIG. 4 is a cross-sectional view of the seal assembly of FIG. 3 taken along line IV-IV;

FIG. 5 is a top view of one embodiment of the electric toothbrush of the present utility model;

fig. 6 is a partial cross-sectional view of the electric toothbrush of fig. 5 taken along line VI-VI

FIG. 7 is a partial enlarged view of FIG. 6 at A

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

It should be noted that, if a directional indication (such as up, down, left, right, front, and rear … …) is involved in the embodiment of the present utility model, the directional indication is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional indication is correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B meet at the same time.

The utility model provides a sealing assembly.

In the embodiment of the present utility model, referring to fig. 1 to 5, the sealing assembly 100 is used for sleeving the motor shaft 40 of the electric toothbrush 200 and sealing the space between the motor shaft 40 and the handle housing 30 of the electric toothbrush 200, and is characterized in that the sealing assembly 100 comprises a hard sealing frame 10 and a flexible sealing sleeve 20 covering the hard sealing frame 10; the flexible sealing sleeve 20 is used for being sleeved on the periphery of the motor shaft 40; the hard seal frame 10 comprises an axial seal part 11 and a radial seal part 12 which is annularly arranged on the periphery of the axial seal part 11; the flexible sealing sleeve 20 comprises an axial sealing surface 21 extending in the axial direction of the motor shaft 40; the axial seal portion 11 is for supporting the axial seal surface 21 in the radial direction of the motor shaft 40 so that the axial seal surface 21 sealingly engages the motor shaft 40 and/or the handle housing 30; the flexible sealing sleeve 20 includes a radial sealing surface 22 extending radially of the motor shaft 40; the radial seal portion 12 is for supporting the radial seal surface 22 in the axial direction of the motor shaft 40 so that the radial seal surface 22 sealingly engages the handle housing 30.

The sealing assembly 100 is sleeved on the motor shaft 40 of the electric toothbrush 200 and seals a space between the motor shaft 40 and the handle housing 30 of the electric toothbrush 200, preventing external water from flowing into the handle housing 30 through a gap between the motor shaft 40 and the sealing assembly 100 or flowing into the handle housing 30 through a gap between the handle housing 30 and the sealing assembly 100.

The seal assembly 100 includes a rigid seal carrier 10 and a flexible seal carrier. The hard seal frame 10 may be made of PET, PS, metal, alloy, or the like, and the flexible seal frame may be made of rubber, plastic, or the like. The flexible boot seal 20 encloses the rigid seal housing 10. In other words, the rigid seal carrier 10 is disposed within the wall of the flexible seal cartridge 20. This structure has the following advantages: first, the drop resistance of the seal assembly 100 is enhanced. In the case where the hard seal carrier 10 is disposed at the periphery of the flexible sealing sleeve 20, the hard seal carrier 10 may be broken when the electric toothbrush 200 is dropped. This may result in failure of the support of the flexible gland 20 by the rigid seal carrier 10, thereby resulting in a reduced sealing effect of the flexible gland 20. In this embodiment, the flexible sealing sleeve 20 covers the hard sealing frame 10. The flexible boot seal 20 protects the rigid seal carrier 10 when the powered toothbrush 200 is dropped. Even if the hard seal 10 breaks, the supporting effect is not affected. And secondly, the buffer function is exerted. The motor shaft 40 will vibrate continuously during operation and will drive other components within the housing. The seal assembly 100 is mounted between the motor shaft 40 and the handle housing 30, and the flexible boot seal 20 encloses the rigid seal housing 10, avoiding wear of other components due to vibration. Thirdly, saving the internal space of the shell. When the hard seal frame 10 is disposed at the outer side or the lower end of the flexible sealing sleeve 20, an additional space is reserved in the handle housing 30 to accommodate the hard seal frame 10. In this embodiment, the flexible sealing sleeve 20 covers the hard sealing frame 10, so that the internal space of the handle housing 30 is saved, and the internal integration level of the electric toothbrush 200 is improved.

The hard seal holder 10 includes an axial seal portion 11 and a radial seal portion 12 provided around the outer periphery of the axial seal portion 11. The flexible sealing sleeve 20 comprises an axial sealing surface 21 extending in the axial direction of the motor shaft 40. The axial seal portion 11 supports the axial seal surface 21 in the radial direction of the motor shaft 40, so that the axial seal surface 21 is in sealing contact with the motor shaft 40 and/or the handle housing 30. The flexible gland 20 includes a radial seal surface 22 extending in a radial direction of the motor shaft 40, the radial seal surface 22 for supporting the radial seal surface 22 in an axial direction of the motor shaft 40 such that the radial seal surface 22 sealingly engages the handle housing 30. The seal assembly 100 thus provides multiple waterproofing, i.e., an axial seal between the motor shaft 40 and the seal assembly 100, while providing an axial seal and a radial seal between the handle housing 30 and the seal assembly 100.

According to the utility model, the hard sealing frame 10 is covered by the flexible sealing sleeve 20, so that the anti-falling capability of the sealing assembly 100 is enhanced, and the problem that the supporting effect of the hard sealing frame 10 is invalid due to external force impact, so that the sealing effect of the flexible sealing sleeve 20 is poor is avoided. The axial sealing surface 21 of the flexible gland 20 provides an axial seal between the motor shaft 40 and the seal assembly 100 and between the handle housing 30 and the seal assembly 100, and the radial sealing surface 22 of the flexible gland 20 provides a radial seal between the handle housing 30 and the seal assembly 100.

Further, with reference to fig. 2-4, the flexible sealing sleeve 20 includes a sealing sleeve 23; the outer side and the inner side of the sealing sleeve 23 form an axial sealing surface 21; an axial sealing groove 231 is formed in the side wall of the sealing sleeve 23, and the axial sealing groove 231 extends along the axial direction of the sealing sleeve 23; the axial seal portion 11 is fitted in the axial seal groove 231, and the axial seal portion 11 supports the outer side surface and the inner side surface of the seal sleeve 23 so that the outer side surface and the inner side surface of the seal sleeve 23 are respectively sealed against the handle housing 30 and the motor shaft 40.

The sealing sleeve 23 is sleeved on the motor shaft 40, and the outer side surface and the inner side surface of the sealing sleeve 23 form an axial sealing surface 21, so that the sealing sleeve 23 can seal the motor shaft 40 and the handle shell 30 at the same time. This saves the number of parts and saves the interior space of the handle housing 30. An axial seal groove 231 is formed in the side wall of the seal sleeve 23, the axial seal groove 231 extends along the axial direction of the seal sleeve 23, and the axial seal part 11 is adaptively embedded in the axial seal groove 231. The axial sealing part 11 is embedded in the axial sealing groove 231 along the axial direction of the motor shaft 40, and the axial sealing part 11 is tightly pressed on the inner wall surface of the axial sealing groove 231 to provide supporting force for the outer side surface and the inner side surface of the sealing sleeve 23, so that the outer side surface and the inner side surface of the sealing sleeve 23 are respectively in sealing fit with the handle shell 30 and the motor shaft 40, and further the axial sealing of the handle shell 30 and the motor shaft 40 is respectively realized.

Further, referring to fig. 2 to 4, the flexible sealing sleeve 20 further includes a sealing ring 24 disposed around the outer periphery of the sealing sleeve 23, and an upper end surface of the sealing ring 24 forms a radial sealing surface 22; the seal ring 24 is provided with a radial seal groove 241 communicated with the axial seal groove 231, and the radial seal groove 241 extends along the radial direction of the seal ring 24; the radial seal portion 12 is adaptively embedded in the radial seal groove 241, and the radial seal portion 12 supports the upper end surface of the seal ring 24 along the axial direction of the seal ring 24, so that the upper end surface of the seal ring 24 is in sealing fit with the handle housing 30.

The flexible sealing sleeve 20 comprises a sealing sleeve 23 and a sealing ring 24 arranged around the outer circumference of the sealing sleeve 23. The lower end edge of the seal sleeve 23 may be connected to the upper end edge of the seal ring 24, or the outer side surface of the seal sleeve 23 may be connected to the inner side surface of the seal ring 24. The upper end surface of the seal ring 24 forms the radial seal surface 22. The seal ring 24 is provided with a radial seal groove 241 extending in the radial direction of the seal ring 24, and the radial seal portion 12 is fitted in the radial seal groove 241. The radial seal portion 12 supports the inner wall surface of the radial seal groove 241, and seals the upper end surface of the seal ring 24 against the handle housing 30 in the axial direction of the motor shaft 40, thereby realizing radial sealing of the handle housing 30.

The radial seal groove 241 is communicated with the axial seal groove 231, so that the joint of the radial seal portion 12 and the axial seal portion 11 supports the outer side surface of the flexible seal portion, thereby making the sealing effect better.

Further, referring to fig. 2, 6 and 7, the axial seal portion 11 extends in the axial direction of the seal sleeve 23 to form a cylindrical ring 13; the radial seal portion 12 extends radially of the seal ring 24 to form a flat backing ring 14; the flat backing ring 14 surrounds and is fixedly connected to the periphery of the lower end of the cylindrical ring 13; the outer side surface and the inner side surface of the cylindrical ring 13 support the outer side surface and the inner side surface of the seal sleeve 23, respectively, in the radial direction of the cylindrical ring 13; the upper end surface of the flat grommet 14 axially supports the upper end surface of the seal ring 24 along the flat grommet 14.

The axial sealing part 11 extends along the axial direction of the sealing sleeve 23 to form a cylindrical ring 13; the radial seal portion 12 extends radially of the seal ring 24 to form a flat backing ring 14. The cylindrical ring 13 and the sealing sleeve 23 have the same outer contour, as do the flat grommet 14 and the sealing ring 24. The same outer profile provides better support and fit of the cylindrical ring 13 and gland, flat gasket ring 14 and seal ring 24, and thus better sealing of the seal assembly 100.

The flat gasket ring 14 surrounds and is fixedly connected to the outer periphery of the lower end of the cylindrical ring 13, wherein the lower end edge of the cylindrical ring 13 is connected with the upper end edge of the flat gasket ring 14, or the outer side surface of the cylindrical ring 13 is connected with the inner side surface of the flat gasket ring 14.

Further, referring to fig. 4 to 7, the inner side surface portion of the seal sleeve 23 is raised to form at least one first seal ring 232 extending around the circumferential direction of the seal sleeve 23, and the inner side surface of the cylindrical ring 13 supports the first seal ring 232 in the radial direction of the cylindrical ring; the outer side wall portion of the seal sleeve 23 bulges to form at least one second seal ring 233 extending around the circumferential direction of the seal sleeve 23, and the outer side surface of the cylindrical ring 13 supports the second seal ring 233 in the radial direction of the cylindrical ring 13.

The inner side portion of the sealing sleeve 23 bulges to form at least one first sealing ring 232 extending circumferentially around the sealing sleeve 23. The first seal ring 232 may be one or a plurality of seal rings spaced apart from each other in the axial direction of the seal sleeve 23. The inner side surface of the sealing sleeve 23 is partially bulged to form the first sealing ring 232, so that the fit between the inner side surface of the sealing sleeve 23 and the motor shaft 40 is tighter, and the axial sealing effect of the motor shaft 40 is better.

The outer side wall portion of the sealing sleeve 23 bulges to form at least one second sealing ring 233 extending circumferentially around the sealing sleeve 23. The second seal ring 233 may be one or a plurality of second seal rings spaced apart from each other in the axial direction of the seal sleeve 23. The second sealing ring 233 is formed by partially bulging the outer side of the sealing sleeve 23, so that the outer side of the sealing sleeve 23 is tightly attached to the housing, and the axial sealing effect of the housing is better.

The side surface of the sealing sleeve 23 is bulged to form a first sealing ring 232 and a second sealing ring 233 at the same time, so that double waterproof can be realized. I.e., the axial sealing effect of the motor shaft 40 and the housing can be enhanced.

Further, referring to fig. 4 to 7, the first seal ring 232 and the second seal ring 233 are each provided corresponding to the cylindrical ring 13.

Although the first seal ring 232 and the second seal ring 233 are not provided corresponding to the cylindrical ring 13, the sealing effect of the inner side surface and the outer side surface of the seal sleeve 23 can be enhanced, but the effect is limited. Since the seal sleeve 23 is flexible and has a limited self-supporting force, the sealing effect of the first seal ring 232 and the second seal ring 233 formed by bulging of the side portions of the seal sleeve 23 is limited without external support. In this embodiment, the present utility model is applicable to a variety of applications. The first seal ring 232 and the second seal ring 233 are provided corresponding to the cylindrical ring 13. Thus, the cylindrical ring 13 can provide external support for the first seal ring 232 and the second seal ring 233, so that the first seal ring 232 and the second seal ring 233 are respectively pressed to the motor shaft 40 and the housing, and the sealing performance of the sealing sleeve 23 is enhanced.

Further, referring to fig. 4 to 7, the upper end surface portion of the seal ring 24 is raised to form at least one third seal ring 242 extending circumferentially around the seal sleeve 23; the third seal ring 242 is disposed corresponding to the flat grommet 14, and an upper end surface of the flat grommet 14 supports the third seal ring 242 in an axial direction of the flat grommet 14.

The upper end surface of the sealing ring 24 bulges around the circumferential portion of the sealing sleeve 23 to form at least one third sealing ring 242. The third seal ring 242 may be one or a plurality of the third seal rings disposed at intervals in the circumferential direction around the seal sleeve 23. The arrangement of the third seal ring 242 corresponding to the flat gasket ring 14 in this embodiment is advantageous over the arrangement of the third seal ring 242 not corresponding to the flat gasket ring 14, and the flat gasket ring 14 provides external support to the third seal ring 242, so that the third seal ring 24 can be compressed to the handle housing 30 along the axial direction of the motor shaft 40, and the radial sealing effect of the handle housing 30 is enhanced.

In one embodiment, the flexible boot seal 20 is injection molded around the periphery of the rigid seal housing 10.

The flexible boot seal 20 encloses the rigid seal carrier 10. If splicing and bonding are adopted, gaps exist on the surface of the flexible sealing sleeve 20, so that the sealing effect is poor. In this embodiment, the hard sealing frame 10 and the flexible sealing sleeve 20 are integrally injection molded, and the flexible sealing sleeve 20 is injection-molded and filled around the hard sealing frame 10. Thus, gaps do not exist on the surface of the flexible sealing sleeve 20, the risk of water seepage of the flexible sealing sleeve 20 is avoided, the production assembly efficiency of the sealing assembly 100 is improved, materials are saved, and the production cost is further reduced.

Further, referring to fig. 2 and 4, at least one fixing hole 131 is formed in the cylindrical ring 13 and/or the flat gasket ring 14; the flexible sealing sleeve 20 is injection-molded to fill the fixing hole 131.

The fixing hole 131 may be one or more. The fixing holes 131 may be disposed at intervals around the circumference of the cylindrical ring 13 and/or around the circumference of the flat pad ring 14. The fixing hole 131 has double functions, on one hand, when the integrated injection molding is performed, the fixing hole 131 can be used as a glue inlet; on the other hand, the injection filling of the fixing holes 131 by the flexible sealing sleeve 20 can enhance the bonding strength between the flexible sealing sleeve 20 and the hard sealing frame 10, so that the two are tightly attached to each other, and a better sealing effect is achieved.

Further, referring to fig. 2 and 4, the fixing hole 131 is opened at a sidewall of the cylindrical ring 13 and is close to an upper end surface of the cylindrical ring 13.

A cylindrical ring 13 is located at the upper end of the rigid seal housing 10. In this embodiment, the fixing hole 131 is formed at the upper end of the hard seal holder 10. This is because the fixing hole 131 has a function of a glue inlet. Glue is injected from the fixing buckle and flows in the die under the traction of gravity. The higher the position of the fixing hole 131 is, the more uniform the glue can flow to the periphery, and the phenomenon of glue shortage in the die is avoided.

The present utility model also proposes an electric toothbrush 200, referring to fig. 6 and 7, the electric toothbrush 200 includes a handle housing 30, a motor shaft 40 and a sealing assembly 100, and the specific structure of the sealing assembly 100 refers to the above embodiment, and since the electric toothbrush 200 adopts all the technical solutions of all the embodiments, at least has all the advantages brought by the technical solutions of the embodiments, and will not be described in detail herein. Wherein, the top end of the handle shell 30 is provided with a through hole, and the motor shaft 40 is penetrated through the through hole; the seal assembly 100 is sleeved on the motor shaft 40 and is clamped between the motor shaft 40 and the inner wall surface of the through hole.

In this embodiment, the seal assembly 100 is sandwiched between the motor shaft 40 and the inner wall surface of the through hole, so that the seal assembly 100 is sealed and fixed between the motor shaft 40 and the inner wall surface of the through hole, and the axial sealing effect of the handle housing 30 and the motor shaft 40 is further enhanced.

Further, referring to fig. 6 and 7, the electric toothbrush 200 further includes a motor body 50 located within the handle housing 30; the seal assembly 100 is interposed between the upper end surface of the motor body 50 and the handle housing 30.

The motor main body 50 refers to a portion of the motor assembly other than the motor shaft 40. In this embodiment, the seal assembly 100 is sandwiched between the upper end surface of the motor main body 50 and the handle housing 30, the motor main body 50 supports the seal assembly 100 upward, and the handle housing 30 supports the seal assembly 100 downward, so that the seal assembly 100 is sealed in the space between the motor main body 50 and the handle housing 30, and the radial seal effect of the handle housing 30 is further enhanced.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, one of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (12)

1. The utility model provides a seal assembly for cover is located electric toothbrush's motor shaft, and seals the space between motor shaft and electric toothbrush's handle casing, its characterized in that, seal assembly includes stereoplasm seal frame and cladding stereoplasm seal frame's flexible seal cover;

the flexible sealing sleeve is used for being sleeved on the periphery of the motor shaft;

the hard sealing frame comprises an axial sealing part and a radial sealing part which is annularly arranged on the periphery of the axial sealing part;

the flexible sealing sleeve comprises an axial sealing surface extending along the axial direction of the motor shaft; the axial sealing part is used for supporting the axial sealing surface in the radial direction of the motor shaft so as to enable the axial sealing surface to be in sealing fit with the motor shaft and/or the handle shell;

the flexible sealing sleeve comprises a radial sealing surface extending along the radial direction of the motor shaft; the radial sealing part is used for supporting the radial sealing surface in the axial direction of the motor shaft so as to enable the radial sealing surface to be in sealing fit with the handle shell.

2. The seal assembly of claim 1, wherein the flexible sealing boot comprises a sealing sleeve;

the outer side surface and the inner side surface of the sealing sleeve form the axial sealing surface;

an axial sealing groove is formed in the side wall of the sealing sleeve, and extends along the axial direction of the sealing sleeve;

the axial sealing part is adaptively embedded in the axial sealing groove, and supports the outer side face and the inner side face of the sealing sleeve, so that the outer side face and the inner side face of the sealing sleeve are respectively in sealing fit with the handle shell and the motor shaft.

3. The seal assembly of claim 2, wherein the flexible sealing boot further comprises a sealing ring disposed around the periphery of the sealing sleeve, the upper end surface of the sealing ring forming the radial sealing surface;

the sealing ring is provided with a radial sealing groove communicated with the axial sealing groove, and the radial sealing groove extends along the radial direction of the sealing ring;

the radial sealing part is adaptively embedded in the radial sealing groove, and supports the upper end face of the sealing ring along the axial direction of the sealing ring, so that the upper end face of the sealing ring is in sealing fit with the handle shell.

4. A seal assembly according to claim 3, wherein the axial seal extends in an axial direction of the seal sleeve to form a cylindrical ring; the radial sealing part extends along the radial direction of the sealing ring to form a flat backing ring; the flat cushion ring surrounds and is connected with the periphery of the lower end of the cylindrical ring;

the outer side surface and the inner side surface of the cylindrical ring respectively support the outer side surface and the inner side surface of the sealing sleeve along the radial direction of the cylindrical ring;

the upper end face of the flat gasket ring supports the upper end face of the sealing ring along the axial direction of the flat gasket ring.

5. The seal assembly of claim 4 wherein an inner side surface portion of said seal sleeve bulges to form at least one first seal ring extending circumferentially around said seal sleeve, an inner side surface of said cylindrical ring supporting said first seal ring in a radial direction of said cylindrical ring;

the outer side wall portion of the sealing sleeve bulges to form at least one second sealing ring extending around the circumference of the sealing sleeve, and the outer side surface of the cylindrical ring supports the second sealing ring along the radial direction of the cylindrical ring.

6. The seal assembly of claim 5, wherein the first seal ring and the second seal ring are each disposed in correspondence with the cylindrical ring.

7. The seal assembly of claim 6 wherein an upper face portion of said seal ring is raised to form at least one third seal ring extending circumferentially about the seal sleeve; the third sealing ring is arranged corresponding to the flat gasket ring, and the upper end face of the flat gasket ring supports the third sealing ring along the axial direction of the flat gasket ring.

8. The seal assembly of any of claims 4-7, wherein the flexible boot seal is injection molded around the periphery of the rigid seal carrier.

9. The seal assembly of claim 8, wherein at least one securing hole is formed in the cylindrical ring and/or the flat grommet;

and the flexible sealing sleeve is injection-molded and filled in the fixing hole.

10. The seal assembly of claim 9 wherein said securing aperture is open at a side wall of said cylindrical ring and is proximate an upper end surface of said cylindrical ring.

11. An electric toothbrush comprising a handle housing, a motor shaft and a seal assembly according to any one of claims 1 to 10;

the top end of the handle shell is provided with a through hole, and the motor shaft penetrates through the through hole;

the sealing component is sleeved on the motor shaft and is clamped between the motor shaft and the inner wall surface of the through hole.

12. The electric toothbrush of claim 11, further comprising a motor body within the handle housing;

the sealing component is clamped between the upper end face of the motor main body and the handle shell.